caddy



(No Model.) 2Sheets-Sheet 1.

T. B. OADDY.

. FURNACE; No. 464,008. Patented Dec. 1, 1891.

(No Model.) 7 2 Sheets-Shet 2.-

T. E. O'ADDY.

FURNAGE.

No. 464,008. Patent ed'Dec. 1,1891.

UNITED STATES PATENT.

THOMAS EDlVARD CADDY, OF NOTTINGHAM, ENGLAND.

FURNACE.

SPECIFICATION forming part of Letters Patent No. 464,008, dated December1, 1891.

Application filed September 1, 1891- Serial No. 404,481. (No model.)

To all whom it may concern:

Be it known that I, THOMAS EDWARD CADDY, a subject of the Queen ofEngland, residing at Nottingham, in England, have invented certain newand useful Improvements in or Relating to Furnaces, of which thefollowing is a specification.

This invention relates to improvements in furnaces which are built up ofbrick or the like, such as externally-fired boilers, andis also partlyapplicable to furnaces generally. It will be best understood byreference to the accompanying drawings, in which Figure 1 is alongitudinal section of a furnace constructed according to my invention,shown in connection with a brewers copper. Fig. 2 is a transversesection taken on line a :r of Fig. 1. Fig. 3 is a longitudinal sectionof a furnace, showing a modification; and Fig. 4 is a transverse sectiontaken on line 00 0c of Fig. 3. e

In carrying out this invention to utilize the heat which is sodestructive with present arrangements to the sides of the furnace, Iemploy metal cheeks A, of a suitable height and extending preferably thewhole length ofthe furnace. These cheeks A may be formed hollow or builtin, as shown, with an air-space B between the cheeks and the brick workC. To render them more durable, they may be cast with chilled faces, andmay also be formed insegments, so that worn or damaged parts may beremoved and new parts substituted therefor. Through each of the passagesformed in the hollow cheeks A or through each space B a current of airmay be conveyed from the front to the back or into a hollow bridge, or,as shown in the drawings; the air may be taken up at the opening D atthe back of the furnace and below the bars E, and delivered at theopening F at the front of the furnace above the bars. In this case theheated air is delivered in front of the fire over which it passes. Inboth cases the air assists in the consumption of the smoke and alsohelps to preserve the checks by keeping them from becoming overheated.The opening Dmay be provided with a door D, sliding, as shown, or of anyother convenient form, so that the air-current may be regulated. In somecases one or more air passages may be formed through the cheeks bycasting one or more tubes in them, those in each segment being in directconnection with or delivering the air to the corresponding tubes in thesegment next to it, or the cheeks may be built up of tubular bars H, asin Figs. 3 and 4, adapted so as to be built in with their faces formingthe vertical sides of the furnace, the air being taken up and conveyedby the tubular passages H, either from the front of the furnace anddelivered at the back of or near the bridge, or from the back to thefront, discharging the air at a suitable height above the bars, in thesame manner as hereinbefore described and shown, suitable arrangementbeing made at the front or back to permit ofaccess of air to the tubularpassages and at the front or back for its delivery.

As shown in Figs. 3 and 4, the tubular passages H are connected at thefront to an airpassage I, provided with an opening at I below thefire-bars F, and fitted with an adj ustable door D, and at the back toan air-passage J, passing through the bridge and provided with anopening at- J.

I preferably employ bars E, in each of which a tube is cast to form anair-passage through it to the back of or into a hollow bridge, for thesame purpose as hereinbefore described. The receiving end Gof the tubeis bent downward at a suitable angle, so as to pass out of the bar belowand at asuitable distance from the end instead of passing straightthrough, as heretofore. WVith this arrangement the ends E of the bars Emay be formed so as to engage with an ordinary dead-plate K, and thenecessity for an additional bearer-bar is thus done away, and the underside of the bar may be left cleared, so as to afford an increased draft.The ends of the tubes may also be cut'at an angle, as shown, and are ina better position for taking up the air and are less likely to getchoked with ashes or dust. The bars may also be arranged to take up theair at the back, as shown in dotted lines at L, Fig. 1, in which casethe air would be delivered at the front into preferably a hollowdead-plate and would pass over the fire. This I find to be moreeffective in some cases for consuming the smoke than delivering the airat the back, as heretofore.

In the process of casting the bars I preferably employ a metal plateprovided with an opening for receiving and supportingthe bent ends ofthe tubes in the mold. The plate is rammed in and supported or partiallysupported by the sand. The pattern is preferably provided with acore-print corresponding to the position of the bent end of the tube andis preferably molded in an inverted position on a plate. \Vhen thepattern has been partially rammed, the supporting-plate is placed ontheprint, the box is then filled, and t he process of ramming completed,after which the box is turned and the pattern drawn, leaving the platein the mold, whichreceives the end of and thus affords support to thetube. The supporting-plate may be provided with a stop to limit thelength of tube passing through the plate, and may also be secured morefirmly in position by pins passing through the moldingbox engaging withthe plate, or in any other well-known manner. For example, in some casesthe plate may be hinged to the moldingbox. The straight end of the tubemay also be carried and supported in the mold by a plate fitting in theend of the molding-box adjusted by a suitable stop or stops and providedwith an opening to reeeive the end of the tube.

I claim- 1. Afurnace having the respective side walls thereof providedwith air-channels for conveying airlengthwise of the furnace and aboveand below the grate, and said channels inclosed by metal cheeks disposedflush with the side walls and extending upward from the grate,substantially as and for the purposes set forth.

2. A furnace having the respective side Walls thereof provided withair-channels for conveying air lengthwise of the furnace and above andbelow the grate, and composed of tubes disposed flush with said walls,so as to form metallic cheeks, which extend upward from,

'said grate, substantially as and for the purposes set forth.

In, testimony whereof I have hereto set my hand in the presence of thetwo subscribing witnesses.

THOMAS ED\VARD (DADDY.

\Vitnesses:

IL 0. SHELDON, A. A. DICKINSON.

